Omron FQM1-MMA21 Manuel D’Utilisation

A414

02

RS-422A 
Port 
Error 
Flags

Parity Error Flag

These error flags turn ON when an error has occurred at the RS-
422A port.

03

Framing Error Flag

04

Overrun Error Flag

05

Timeout Error Flag

08

RS-422A Port Communications Error Flag

Turns ON when a communications error has occurred at the RS-
422A port.

09

RS-422A Port Send Ready Flag (no-protocol 
mode)

Turns ON when the RS-422A port is ready to send data in no-pro-
tocol mode.

10

RS-422A Port Reception Completed Flag (no-
protocol mode)

Turns ON when the RS-422A port has completed the reception in 
no-protocol mode.

11

RS-422A Port Reception Overflow Flag (no-pro-
tocol mode)

Turns ON when a data overflow occurred during reception 
through the RS-422A port in no-protocol mode.

15

RS-422A Port Settings Changing Flag

Turns ON while the RS-422A port’s communications settings are 
being changed. 

A415

00 to 15 RS-422A Port Reception Counter (no-protocol 

mode)

Indicates (in binary) the number of bytes of data received when 
the RS-422A port is in no-protocol mode.

A500

14

Error Log Pointer Reset and Memory Not Held 
Flag OFF Bit

The error log pointer in A408 is reset to 0000 hex and Memory 
Not Held Flag (A404.14) is turned OFF when this bit is turned 
ON.

A502

00

RS-232C Port Restart Bit

Turn this bit ON to restart the RS-232C port. 

This bit is turned OFF automatically when the restart processing 
is completed.

01

Peripheral Port Restart Bit

Turn this bit ON to restart the peripheral port. 

This bit is turned OFF automatically when the restart processing 
is completed.

02

RS-422A Port Restart Bit

Turn this bit ON to restart the RS-422A port. 

This bit is turned OFF automatically when the restart processing 
is completed.

A507

00 to 15 Data Trace Period

Data will be traced using the period specified here when tracing 
each cycle is specified from the CX-Programmer. 
0000 hex: Each cycle
0001 to 000F hex: Every 2 to 16 cycles

A508

09

Differentiate Monitor Completed Flag

Turns ON when the differentiate monitor condition has been 
established during execution of differentiation monitoring.

(This flag will be turned OFF when differentiation monitoring 
starts.)

11

Trace Trigger Monitor Flag

Turns ON when a trigger condition is established by the Trace 
Start Bit (A508.14). OFF when the next Data Trace is started by 
the Sampling Start bit (A508.15).

12

Trace Completed Flag

Turns ON when sampling of a region of trace memory has been 
completed during execution of a Trace.
Turns OFF when the next time the Sampling Start Bit (A508.15) is 
turned from OFF to ON.

13

Trace Busy Flag

Turns ON when the Sampling Start Bit (A508.15) is turned from 
OFF to ON. Turns OFF when the trace is completed.

14

Trace Start Bit

Turn this bit ON to establish the trigger condition. The offset indi-
cated by the delay value (positive or negative) determines which 
data samples are valid.

15

Sampling Start Bit

When a data trace is started by turning this bit from OFF to ON 
from the CX-Programmer, the FQM1 will begin storing data in 
Trace Memory by one of the three following methods: 

1) Data is sampled at regular intervals (10 to 2,550 ms).
2) Data is sampled when TRSM(045) is executed in the program.

3) Data is sampled at the end of every cycle.

The operation of A508.15 can be controlled only from the CX-Pro-
grammer.

A509

15

Constant Cycle Time Exceeded Error Clear Bit

Used to enable the constant cycle time function again after the 
constant cycle time has been exceeded. 

A510 to 
A514

00 to 15 Macro Area Input Words

Before the subroutine specified in MCRO(099) is executed, the 
contents of the five words specified in the operand to be passed 
to the subroutine are stored here.

A515 to 
A519

00 to 15 Macro Area Output Words

After the subroutine specified in MCRO(099) has been executed, 
the results of the subroutine are transferred to these five words.